Improvement in thill-couplings



T. BURR. .Ihill Coupling.-

No, 112,318. Patented March 7, 187-0.

mains, Pubroumosnwnm wAsymaToN o c Improvement in Thin-Couplings; and I do declare that the following is a full, clear, and exact descripj tion of the constructional d operation of the sani'e,

1 a part of this specification, inwhich-- fof olasps, or otherwise, not shown.

1 Figure thill. 1 Figure 3 is the two parts coupled together.

structed so as to form a parts of two circles.

(of the upper curve A. v

new: emit; J

THEODORE BURRQOFBATTLE CREEK, MICHIGAN, ASSIGNORTO ALLEN MUlR AND-vfiENRY MUIR, 0F SAME PLAOE.

Letters Patent No. 112,318, dated March 7, 1871.

n IMPROVE ENT IN Tl-IILL-COUPLINGS.

1 The sehednlexeferred to in these LettersPatent and making part of the same.

1 Be it known;thataLDn Tnsnononn Bonn, of the city or Battle Oreelgin the countyof Calhoun and State of Michigan, have inventeda newand useful reference beinghacl to .the annexed drawing making Figure L is: a perspective view of the eye-piece, which is to be secured .to the joarriage=axle by means 2-is the strap which is to heattached to the.

The eye, as seen at fig. 1 of 1 the drawing, is conchamber or socket having .The upper curve, marked A, forms a half circle.

The lower curve, marked B, formsa quarter oircle, and is longer in diameter than the upper circle A.

1 The front points of the two curves A and B terminate so as toleare an opening (equal to the diameter The strap, fig. 2, is constructed with a pin, D, forged on the upper sideof and at right angles with the strap, and at the end to be attached to the eye, the pin D corresponding exactly in diameter to that of the upper curve A inside the chamber.

The lower side of strap 2 corresponds with the diameter of the lower curve B. Having a joint thus constructed, by raising the end of the strap to its highest or perpendicular point the end D will enter the cham.

ber. Then, by lowering the strap to ahorizontal position, the lower curve of the strap enters the chamber below. When thus inposition the chamber olasps thevpin' D and lower curve on the strap, and thus forms aperfect and secure joint in the coupling, as

in fig. 3.

What I claim as my invention, and desire to secure by Letters Patent, is-

A thill-coupling, substantially as set forth and descrihedin this specification.

g Dn. THEODORE BUBR. Witnesses:

" M. B. RussELL,

H. T. WOODWORTH. 

